03 Suzuki aerio very rough idle. just replaced head gasket. had warped head machined. previous owner had overheating problems. codes showing p0327;p0505; and p0304. causes?

1. Make sure the electric radiator fan(s) is kicking in when the coolant temperature gets hot. If not that will be part of the problem and if the temperature sensor/switch is faulty the fans may not operate.

2. You may have a restriction in the cooling system that is significantly retarding the flow of coolant through the engine coolant passages or through the radiator. This can be caused by a build up of debris in the system so you cannot achieve optimum coolant flow.


3. You may have a combustion leak via a failed cylinder head gasket into the cooling system. This will cause hot combustion gasses to flow from the cylinder into the cooling system and the coolant will overheat. Bubbles showing up in the cooling system is a possible indication of that. A leak down test will show this up. This involves blowing compressed air into the cylinders one by one through the spark plug openings. If air enters the cooling system in this test bubbles will appear in the coolant and it is a sign of a failed cylinder head gasket and that combustion gasses are able to escape into the cooling system when the engine is running.

4. THE rough idle may be a low RPM miss fire in one or more cylinders. You need to have the vehicle scanned to see what fault codes the computer is generating. If you have rough idle once the engine has warmed up there will be one or more fault codes being generated. Once scanned and all the fault codes are found, the cause of the fault codes can be investigated and the problem fixed.



5. Do not hesitate to have the problem of the overheating checked out. Running the car with the engine overheating WILL cause expensive engine damage many times more than it will cost to fix the problem now. If you have been running the engine frequently in an overheated condition you may well have already caused failure of the cylinder head gasket but I hope this is not the case. Running the engine overheated can also cause the cylinder head to warp and crack. These are expensive engine repairs you definitely want to avoid.

6. You did not indicate the year, model of vehicle and engine type you have. Please provide this information if you have future questions as this normally has a direct bearing on the content of answers people are able to provide.

Hi,your best bet is to buy a haynes manuel it will give you all the write settings,and will also help with future problems.
you can buy online or some place like halfords,all the best with the work.

bad hoses.!! heck they are 10 years old, none last for ever.
a hose that fails is a bad hose. but some old hoses can be
pushed of the edge, sure, but hose is bad never the less.
is the rad cap new,? (do that first) use correct cap, pressure rating
never over 14psi.
my guess is you have venting? (name all overheating facts, SIGNS)
arethere signs oif steam and oil and carbon in the rad side tank or at filler hole (cold checked only)
if yes, that can be bad head gasket or far worse.
get the rad pressure checked (hand pump) leak down test.
then check the rad for exhaust gasses. blue/green tester.

does it only overheat parked.? when?
if it stays cool moving that means the fan is dead, parked.
the natural pressure is 12-14psi regulated by the cap.

you need to do tests first. not change parts.
are you going to replace all parts only to find a warped head.?
i cant hear engine run, nor do rational analysis.
nor see it mess up, or when and how bad. not me. im blind.
asking net bunny's (blind) how to fix this is over the top.
why not get the car serviced by a pro that has all those tools.
(at least 3 tools)
compression tester.
rad leak down finds leaks and if block head cracked or head gasket blown.
green/blue rad cap tester. (exhaust leaks)
a pryo IR heat gun to measure for hot points. (checks cores easy)

03 Suzuki Areio won't idle when hot??

If there is no engine codes like my 03 Areio 2.0 I simply cleaned the throttle body and adjusted the throttle cable when the engine was hot back to 800 rpms.. seems to be the fix. I'm suspecting the cable after 240k was a bit stretched and didn't give enough tension to the butterfly valve after it was up to operating temperature..

Hi,
Your car get overheating before. Please replace your head gasket with original one. Inspect your engine block for crack.

overhaul

Sounds like you first need to go to Auto Zone and have them scan the computer for the check engine light code and find out what is going on with that..it is probably a misfire code, they will print out the code and the cure, may need a good tune with wires.
As far as the wheel soot/?
You may have a leaking axle seal/worn brake pads/frozen,leaking brake line or disc caliper(check the brake fluid level in the master cylinder to confirm a brake fluid leak)

Not generally, unless the engine's been run hot, if even only for a moment. If the head gasket is blown prepare for major out of pocket expenses because if the engine overheated it will bend every valve and usually warp the head beyond repair. I honestly hope this is not your problem, it's an extremely expensive fix. Hope this helps, good luck!

you have a blown headgasket or a cracked block that is allowing water to get into your exhaust syste through the engine take to a shop !!

Its probably not boiling what you are getting is preasure from the engine which can be caused by a faulty head gasket but as you have that changed then it must be a crack or warp in the cylinder head. Get the head preasure checked for cracks and warp. If ita warped get it skimmen if cracked you will need to replace.